ICD10BillableValid for clinical use
ICD-10 Code G37.9: Demyelinating disease of central nervous system, unspecified
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the nervous system (G00-G99).
When is it used?
- May be used when a clinician documents demyelinating disease of central nervous system, unspecified in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
6Diseases of the nervous system (G00-G99)
block
G35-G37Demyelinating diseases of the central nervous system
category
G37Other demyelinating diseases of central nervous system
currentG37
Official coding notes
Inclusion terms
- Clinically isolated syndromes
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
NeurologistGeneral Physician
Related codes
G37.0Diffuse sclerosis of central nervous systemcodeG37.1Central demyelination of corpus callosumcodeG37.2Central pontine myelinolysiscodeG37.3Acute transverse myelitis in demyelinating disease of central nervous systemcodeG37.4Subacute necrotizing myelitis of central nervous systemcodeG37.5Concentric sclerosis [Balo] of central nervous systemcodeG37.8Other specified demyelinating diseases of central nervous systemcategory
Sibling codes
G37.0Diffuse sclerosis of central nervous systembillableG37.1Central demyelination of corpus callosumbillableG37.2Central pontine myelinolysisbillableG37.3Acute transverse myelitis in demyelinating disease of central nervous systembillableG37.4Subacute necrotizing myelitis of central nervous systembillableG37.5Concentric sclerosis [Balo] of central nervous systembillableG37.8Other specified demyelinating diseases of central nervous system
Coverage-related procedures and services
CPT 96105high
ASSESSMENT OF APHASIA (INCLUDES ASSESSMENT OF EXPRESSIVE AND RECEPTIVE SPEECH AND LANGUAGE FUNCTION, LANGUAGE COMPREHENSION, SPEECH PRODUCTION ABILITY, READING, SPELLING, WRITING, EG, BY BOSTON DIAGNOSTIC APHASIA EXAMINATION) WITH INTERPRETATION AND REPORT, PER HOUR
Source: CMS coverage guidance
CPT 92651high
AUDITORY EVOKED POTENTIALS; FOR HEARING STATUS DETERMINATION, BROADBAND STIMULI, WITH INTERPRETATION AND REPORT
Source: CMS coverage guidance
CPT 92652high
AUDITORY EVOKED POTENTIALS; FOR THRESHOLD ESTIMATION AT MULTIPLE FREQUENCIES, WITH INTERPRETATION AND REPORT
Source: CMS coverage guidance
CPT 92653high
AUDITORY EVOKED POTENTIALS; NEURODIAGNOSTIC, WITH INTERPRETATION AND REPORT
Source: CMS coverage guidance
CPT 96113high
DEVELOPMENTAL TEST ADMINISTRATION (INCLUDING ASSESSMENT OF FINE AND/OR GROSS MOTOR, LANGUAGE, COGNITIVE LEVEL, SOCIAL, MEMORY AND/OR EXECUTIVE FUNCTIONS BY STANDARDIZED DEVELOPMENTAL INSTRUMENTS WHEN PERFORMED), BY PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL, WITH INTERPRETATION AND REPORT; EACH ADDITIONAL 30 MINUTES (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 96112high
DEVELOPMENTAL TEST ADMINISTRATION (INCLUDING ASSESSMENT OF FINE AND/OR GROSS MOTOR, LANGUAGE, COGNITIVE LEVEL, SOCIAL, MEMORY AND/OR EXECUTIVE FUNCTIONS BY STANDARDIZED DEVELOPMENTAL INSTRUMENTS WHEN PERFORMED), BY PHYSICIAN OR OTHER QUALIFIED HEALTH CARE PROFESSIONAL, WITH INTERPRETATION AND REPORT; FIRST HOUR
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 1259042008high
Central nervous system demyelination due to Lyme borreliosis
Source: SNOMED International ICD-10 map
SNOMED_CT 1259039002high
Central nervous system demyelination due to Whipple disease
Source: SNOMED International ICD-10 map
SNOMED_CT 1259636005high
Chronic inflammatory demyelinating disease of peripheral nervous system and central nervous system
Source: SNOMED International ICD-10 map
SNOMED_CT 6118003high
Demyelinating disease of central nervous system
Source: SNOMED International ICD-10 map
SNOMED_CT 713543002high
Demyelinating disease of central nervous system co-occurrent with human immunodeficiency virus infection
Source: SNOMED International ICD-10 map
SNOMED_CT 762352004high
Demyelination due to systemic vasculitis
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
G37.9
Common synonyms
Demyelinating disease of central nervous system, unspecifiedDemyelinating disease of central nervous system
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.